That is what I was thinking all along when I was watching Nausicaä Of the Valley of the Wind, a masterpiece by Hayao Miyazaki. The movie documents the story of the planet a thousand years after a global war (Also read about Grave of the Fireflies and Asoka with similar themes) that wipes almost all civilization except for a few communities. The people in one of these, Valley Of The Wind, have to battle not just other communities but also deadly insects and poisonous forests. Prince Nausicaa, with her innocence and disarming charm, is able to win the trust of the insects and they all learn to coexist establishing the harmony between nature and people.

While it is a work of fiction with no political message, it is not inappropriate to imagine what would happen if we do nothing about the warming planet.

For fans of Miyazaki-san, this is yet another beautiful movie. The others that I have seen and recommend are "Princess Mononoke," "Kiki's Delivery Service," and "Spirited Away."